The cycling of your electricity probably didn't hurt it.
Chances are moisture or grease has gotten into the controls. That can ruin the keypad.
The way to prevent that is to be sure you have the microwave's hood vent exhaust fan running whenever you are cooking on the stove top.
If you (or someone you know) might want to replace the keypad yourself, I have uploaded a
handy guide with pictures showing you what's typically involved.
You can usually find helpful exploded view diagrams and order parts by entering your full model number
here.
There
should also be a "mini-manual" hidden inside the unit behind the
control panel or hidden on the left side behind the grille, which is
very helpful when troubleshooting & testing.
If you would like to have us do this for you, we do that for $39.95 plus part costs.
Please feel free to contact me directly if you need more help.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.William E. Miller
[email protected]http://www.microwavedisplay.com
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